Grab on single wire



Nov. 4 1924.

E.-KJDE GRAB ON SINGLE WIRE Filed Dec- 27 1923 3 Sheets-Sheet 1 Nov. 4 1924.

E. KJDE GRAB ON SINGLEWIRE File ad Dec. 27. 1925 3 shunts-Sheet 2 Nov. 4 1924.

1,514,000 E. ,KJqbDE GRAB ON SINGLE WIRE Filed Dec. 27. 1923 3 Sheets-Sheet 3 Patented Nov. 4, 1924.

UNITED STATES EINAR KJ $1313, 015 BERGEN, NORW'AY.

GRAB ON SINGLE WIRE.

Application filed December 27, 1923. Serial No. 683,082.

To all whom-it may concern Be it known that I, EINAR KJ SDE, subject of the King of Norway, residing at Fjeldveien 7 Bergen, Norway, have invented certain new and useful Improvements in Grabs on Single Wire, of which the following is a specification.

The present invention relates to grabs on single wire.

One object of my invention is to provide a grab of the said type which may be opened and emptied in anyvheight, notwithstanding the fact that the single wire of the grab serves both the purpose of suspending'the 15 grab and closing the buckets thereof.

' Another object is to provide a grab, the buckets or scoop halves of which, when the grab is open, are separated a certain dis tance from each other, whereby the gap of the grab becomes wider.

Still other objects of the invention will be apparent from the following description of the preferred embodiment of the .invention shown at the accompanying drawings, in which Fig. 1 is an end view of the grab in closed position; Fig. 2 is an end view of the grab in open posit-ion; Fig. 3 is a side view of the grab as seen from the left in 1, parts being broken away and Fig. 4 shows a detail of the locking member.

The scoop comprises which may be of any convenient shape. Through the outer corner portions of each bucket are passed shafts 3 and 4 respectively, 35 about which the buckets may be tilted or -swung, when they are moved towards or from each other for closing or opening of the grab. On the shafts 3 and 4 are pivotally mounted. loop-shaped arms 5 and 6 respectively, each of which encloses the corresponding bucket. The free ends of the said arms are pivotally connected to a main shaft 7, which extends over the entire length of the buckets. Each of the shafts 3 and ff also carries a pivotally mounted loop 8 and 9 respectively, the upper portions of which are =in' e c ne d y mass cf a bel o sh sh f 10- i To shafts 3 and 4 in the said corners of the buckets are also pivotally connected one end of arms or levers 11 and .12 respectively, the other ends of which are pivotally connected to the main shaft '2'. The other ends 13 and 14 respectively of the said levers are, by means of links 15 and 16 respectively, pivottwo buckets 1 and 2,'

ally connected to bolts 17 and 18 respectively, which are in turn secured to the buckets 1 and 2 respectively. The bolts are situated at two of those corners of the buckets, which are adjacent to each other when the grab is closed.

On the main shaft, and near or at the middle part thereof, are also pivotally mounted two levers 19 the ends 19 of which are secured in relative position by means of a thru bolt On the bolt 20 is pivotally mounted arms or links 21, the other ends of which are pivotally connected to the bolt or short shaft 10 interconnecting the said loops 8 and 9.

Through the other ends 22 of the levers 19 is passed a bolt 23, on which is pivotally mounted a locking arm 24, having a longitudinal slot 25 therein. The outer and free end of the locking arm is suitably curved or shaped at 24 so that the same is adapted to perform the locking functiomwhich will be described later on.

On the bolt 20 are also pivotally mounted two arms or members 26, the upper ends of which are interconnected and held in correct relative position by means of a. rod or bolt 2?. Near the middle portions thereof the members 26 are provided with downwardly extending projections 28, between which extends a bolt 29 that passes through the slot- 25 in the locking arm 24. in the members 26 is also journalled a shaft 30, to which is keyed a wire drum 31 situated between the members 26. Further the said shaft 30 carries at each side of the wire drum 31 a drum or cylinder 32, which rotates in unison with the wire drum 31. The carrying and hoisting wire 33 is wound upon and the end thereof secured to the drum 31, the said wire being guided by means of, a guiding roll 34, which is ,.iounted in a bracket 35 secured to the loop 8: On each cylinder 32 is 'Wgund a Wine 1 8 65 ms direction OP' *positeto that which theinain wire is wound upon the drum 31. The one end of it 7, i is connected fifth}; b l 0 passing through the, loops and On the-bolt 20 of, the levers 19 is pivotally each of the lines 36 mounted a locking memberl37, against the inner projecting end 38 ,of which the end 24of the lockingarm 24 may act The member 37 is prevented from undesired turning by means of a pin 39, the ends of h ch ex nd i er p s 40 i t e nd? 'rial in question, until 19', the said grooves being so arranged that the pin 39, when abutting against the lower side of the grooves 4L0, prevents the locking member 37 from being swung upward to gether with the projecting end 38 and thus release the locking arm 24, but permitting the member 37 to swing the other way, and release the locking arm 2% at the desired moment. For maneuvering of the locking member 37 a loop or shackle .1 or another suitable member may be secured to the said locking member 37, and a maneuvering line or wire may be connected to the said member. The last named line may be guided over the same guiding roll or rolls as the wire 33, and may be extended to the place from where the grab is maneuvered, the free end of the said wire suitably being provided with a weight to keep the same taut.

The action of the grab described above will be understood from the following:

In the position shown in Fig. 1in which the grab is illustrated in closed position the locking arm 24: is locked below the end 38 of the member 37, and the arm 26 has been turned about the bolt 20 upwards against the upper end of the grab, whereby the main shaft 7 is held in raised'position and the buckets thus are held in tion.

Whenthe grab is to be opened, a pull is exerted in the line secured to the shackle 41, whereby the end 38 of the locking member 37 is moved downward. In the moment the end 38 quits the end 24: of the arm 24 the latter is unlocked and turns about the pivot 23. When the arm at swings the pin 29 is guided in the slot 25 until the said pin abuts against the bottom of the slot and thus limits the movement of the arm 24. During the said movement of the locking arm 24 the main shaft 7 is, however, lowered a distance corresponding to the length of the slot 25,

7 closed posi- Whereby the loop-shaped members 5 and 6 are caused to take a new position, practically in the extension of each other, and hereby they move. the buckets 1 and 2 away from each other. At the same time the levers 11, 13 and 12, 14 will make a corresponding movement, and thus, through the intermediary of the links 15 and 16, move the upper middle portion of the buckets 1 and 2 downward and outward. Thus, in the open position of the grab, the buckets 1 and 2 are separated a certain distance from each other.

When the grab is to be filled or closed for taking up sand. coal etc. as may be the case, thesame is lowered on to the mass of mateit rests thereupon.

When the wire 33 is stillgiven'out, it ceases to be taut and the arm 26 is, by reason of its own weight and thatof the drum 31 and cylinders 32, caused to swing downward on the bolt 20 in the direction of the bucket 1.

' The lines 36 then are wound or from the cylinders 32, which when turning in unison with the wire drum 31, cause the latter to wind up the slackened up portion of the 7 wire 33. During the downward movement of the arm 26 the pin 29 is guided in the slot 25, whereby the arm 24 is tilted towards the left, as seen in Fig. 2, by reason of the upper curved portion 24: of the slot 25. When the pin 29 has moved until short of the bottom of the slot 2 1, the free end of the said arm will abut against the end 38of the locking member 37 thereby turning the latter on the bolt 20. In the moment the pin 29 reaches the bottom of the slot 25 the end 24" of the locking arm 24 has been moved past the end 38 of the member 37 (see Fig. 1). and the grab is locked.

When now a pull is exerted through the wire 33, the drum 31 is turned; whereby also the cylinders 32 are turned and the lines 36 are wound thereupon, whereby the arms 26 are swung upward. As the locking arm 24 now is held against movement by means of the end 38 of the locking member' 37, which latter is locked by the pins 39 abutting against the lower edge of the groove 40, the pin 29 cannot move in the slot 25 and accordingly the main shaft 7 will be carried therewith during the upward movement. Thus the arms 5 and 6 move the buckets 1 and 2 towards each other, the arms 11, 13 and 12, 14 at the same time, through the intermediary of the links 15 and 16, swinging the buckets upward on the shafts 3 and 4 respectively until the position shown in Fig. 1 is reached. When the buckets are moved together the grab will, of course, at the same time takeup the material in question, and may then be hoisted further, moved to the desired position and opened by moving the locking member 37 in the manner previously described.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. A grab comprising buckets, a movable shaft, levers connecting the buckets and shaft and adapted, during upward movement of the latter, to cause the buckets to move towards each other, a frame associated with said buckets, a member adapted to be swung downward,a wire drum, a wire on the said drum, line cylinders adapted to move in unison with the wire drum, lines on the cylinders wound in a direction opposite to the wire, and secured to said frame, whereby during swinging movement of said member, the cylinders are rotatedand the rotary movement imparted to the drum causes the wire to wind thereon.

2. A. grab according to claim 1, having a locking arm adapted to co-act with a looking member, said arm being mounted upon the said movable shaft, and Said locking arm being provided with a slot for guiding a pin secured to said member which carries the wire drum.

3. A grab according to claim 1, having a locking arm adapted to co-act with a looking member, said arm being mounted upon the said movable shaft, and said locking arm being provided with a slot for guiding a pin secured to said member which carries the wire drum, means limiting movement of the locking. member in one direction, and means to facilitate its movement in the opposite direction.

4. A grab according to claim 1, having a locking arm adapted to co-act with a locking member, said arm being mounted upon the said movable shaft, and said locking arm being provided with a slot for guiding a pin secured to said member which carries the wire drum, the slot of the locking arm hav ing such shape that the locking arm in the downward movement of the pin, guided in said slot, is automatically caused to be swung into engagement with the locking member.

5. In a grab, a frame, movable buckets mounted on said frame, a movable shaft, means connecting the buckets with the shaft whereby during upward movement of the latter the buckets are brought together, an operating line, a locking member, for maintaining the buckets in closed position, releasing means coacting with the locking member, and means connecting the operating line with the locking member and acting when the line is tensioned and the member is engaged with the releasing means to move the buckets to and maintain them in closed position.

6. A. grab as claimed in claim 5 characterized in that the releasing means is movable to a position to release the locking member and permit the buckets to swing to open position.

7. A grab as claimed iz-ed in that the releasing means is movable to a position to release the locking member and permit the buckets to swing to open position and the locking member is returned into engagement with the releasing means when the buckets come to rest on a support and the line is slackened.

In testimony whereof 1 affix my signature in presence of two witnesses.

EINAR KJQDiE.

Witnesses UE'NOIT P. J nines, H. LILLSTAEDT.

in claim 5 character- 

